CN208847206U - Integral type photoelectricity absolute value encoder - Google Patents
Integral type photoelectricity absolute value encoder Download PDFInfo
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- CN208847206U CN208847206U CN201821692704.XU CN201821692704U CN208847206U CN 208847206 U CN208847206 U CN 208847206U CN 201821692704 U CN201821692704 U CN 201821692704U CN 208847206 U CN208847206 U CN 208847206U
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Abstract
The utility model relates to motor speed measuring technical fields, more particularly to a kind of integral type photoelectricity absolute value encoder, including encoder body, encoder body is built-in with rotary transformer, the application interface of rotary transformer includes DSP decoding arithmetic element, motivate conditioning module, sinusoidal conditioning module and cosine conditioning module, the sinusoidal signal and cosine signal that rotary transformer generates are respectively after excessively sinusoidal conditioning module and cosine conditioning module, and enters DSP after acquired and A/D conversion and decode arithmetic element, DSP decodes arithmetic element and enters rotary transformer through excitation conditioning circuit output sine wave；The rotary encoder decoding that the utility model can efficiently solve the prior art is complicated, sensitive to electromagnetic interference, leads to the problem lower to motor angle and Rotating speed measring precision.
Description
Technical field
The utility model relates to motor speed measuring technical fields, and in particular to a kind of integral type photoelectricity absolute value encoder.
Background technique
For speed regualtion of AC motor, control system requires can realize that high-precision revolving speed is surveyed in the very wide range of speeds
Amount.Currently, the device that tests the speed mainly has photoelectric encoder, tachometer generator, Hall sensor and magnetic rotary encoder etc..Photoelectricity is compiled
Fringe of metrological Radial Gratings is that the angle position information of input is converted into accordingly by detecting element by photoelectric conversion to code device with high precision
Digital code, and be connected with the controllers such as computer and display device, realize digital measurement, digital control and digital display.
Feedback signal of the position of rotor as closed-loop control system, detection accuracy directly affect the property of private dress system
Energy.Wherein magnetic rotary encoder has the advantages that simple framework, at low cost, reliability and degree of protection are high, but its decoding is multiple
It is miscellaneous, it is sensitive to electromagnetic interference.
Utility model content
The technical issues of solution
For disadvantages mentioned above present in the prior art, the utility model provides a kind of integral type photoelectricity absolute encoder
Device, the rotary encoder decoding that can efficiently solve the prior art is complicated, sensitive to electromagnetic interference, cause to motor angle and
The lower problem of Rotating speed measring precision.
Technical solution
In order to achieve the above object, the utility model is achieved by the following technical programs:
A kind of integral type photoelectricity absolute value encoder, including encoder body, the encoder body are built-in with rotation and become
Depressor, the application interface of the rotary transformer include DSP decoding arithmetic element, excitation conditioning module, sinusoidal conditioning module and
Cosine conditioning module, the sinusoidal signal and cosine signal that the rotary transformer generates excessively sinusoidal conditioning module and cosine tune respectively
Enter DSP after managing module, and after acquired and A/D conversion and decode arithmetic element, the DSP decoding arithmetic element is through the excitation
Conditioning circuit output sine wave enters rotary transformer.
Further, DSP decoding arithmetic element selects TMS320F8335 dsp software programmed algorithm, for pair
The signal of rotary transformer output decodes operation, and output is PWM square wave.
Further, the excitation conditioning module includes integrating circuit, blocking filter circuit and amplifying circuit, the side PWM
The integrated circuit conversion of wave is triangular wave, and the triangular wave blocking filter circuit is converted to sine wave, and the sine wave is through amplifying
Circuit carries out amplitude increase.
Further, the sinusoidal conditioning module eliminates the High-frequency Interference in sinusoidal signal by capacitor.
Further, the cosine conditioning module is total to by what the cosine signal of common mode inductance inhibition Differential Input generated
Mould interference.
Further, the output type of the rotary transformer is Sin/Cos, and itself and DSP decoding arithmetic element it
Between be equipped with digital filter for eliminating hysteresis effect.
Beneficial effect
It is had the following beneficial effects: compared with known publicly-owned technology using technical solution provided by the utility model
1, by the design of increase sinusoidal conditioning module and cosine conditioning module, realization is sinusoidal to elimination to be believed the utility model
The common mode interference that the cosine signal of High-frequency Interference and inhibition Differential Input in number generates, while passing through excitation conditioning module
PWM square wave is switched into amplified sine wave so that encoder output just, cosine signal waveform it is smooth, cycle stability, be angle
The resolving of degree and revolving speed provides reliable foundation, to guarantee the precision of detection.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described.It should be evident that the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the rotatable interface circuit diagram of the utility model；
Fig. 2 is the exciting circuit schematic diagram of the utility model；
Label in figure respectively represents: 1- rotary transformer；2-DSP decodes arithmetic element；3- motivates conditioning module；4- is just
String conditioning module；5- cosine conditioning module.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described.Obviously, it is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
Below with reference to embodiment, the utility model will be further described.
Embodiment
A kind of integral type photoelectricity absolute value encoder of the present embodiment, referring to Fig.1-2: including encoder body, encoder
Ontology is built-in with rotary transformer 1, and the application interface of rotary transformer 1 includes DSP decoding arithmetic element 2, excitation conditioning module
3, sinusoidal conditioning module 4 and cosine conditioning module 5, the sinusoidal signal and cosine signal that rotary transformer 1 generates are excessively sinusoidal respectively
Enter DSP after conditioning module 4 and cosine conditioning module 5, and after acquired and A/D conversion and decodes arithmetic element 2, DSP decoding fortune
It calculates unit 2 and enters rotary transformer 1 through excitation conditioning circuit output sine wave.
DSP decodes arithmetic element 2 and selects TMS320F8335 dsp software programmed algorithm, for exporting to rotary transformer 1
Signal decode operation, output be PWM square wave.
Motivating conditioning module 3 includes integrating circuit, blocking filter circuit and amplifying circuit, and the integrated circuit of PWM square wave turns
It is changed to triangular wave, triangular wave blocking filter circuit is converted to sine wave, and sine wave carries out amplitude increase through amplifying circuit.
Sinusoidal conditioning module 4 eliminates the High-frequency Interference in sinusoidal signal by capacitor.
The common mode interference that cosine conditioning module 5 inhibits the cosine signal of Differential Input to generate by common mode inductance.
The output type of rotary transformer 1 is Sin/Cos, and it is equipped between DSP decoding arithmetic element 2 for eliminating
The digital filter of hysteresis effect.
By the design of increase sinusoidal conditioning module 4 and cosine conditioning module 5, realization is sinusoidal to elimination to be believed the utility model
The common mode interference that the cosine signal of High-frequency Interference and inhibition Differential Input in number generates, while passing through excitation conditioning module
PWM square wave is switched to amplified sine wave by 3 so that encoder output just, cosine signal waveform it is smooth, cycle stability is
The resolving of angle and revolving speed provides reliable foundation, to guarantee the precision of detection.
Above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to aforementioned reality
Example is applied the utility model is described in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
Modify or replace, can't make corresponding technical solution essence be detached from various embodiments of the utility model technical solution spirit and
Range.
Claims (6)
1. a kind of integral type photoelectricity absolute value encoder, including encoder body, the encoder body are built-in with rotation transformation
Device, it is characterised in that: the application interface of the rotary transformer includes DSP decoding arithmetic element, excitation conditioning module, sinusoidal tune
Module and cosine conditioning module are managed, the sinusoidal signal and cosine signal that the rotary transformer generates excessively sinusoidal conditioning module respectively
Enter DSP after cosine conditioning module, and after acquired and A/D conversion and decodes arithmetic element, the DSP decoding arithmetic element warp
The excitation conditioning circuit output sine wave enters rotary transformer.
2. a kind of integral type photoelectricity absolute value encoder according to claim 1, which is characterized in that the DSP decoding fortune
It calculates unit and selects TMS320F8335 dsp software programmed algorithm, the signal for exporting to rotary transformer decodes operation, defeated
It is out PWM square wave.
3. a kind of integral type photoelectricity absolute value encoder according to claim 1, which is characterized in that the excitation improves mould
Block includes integrating circuit, blocking filter circuit and amplifying circuit, and the integrated circuit conversion of PWM square wave is triangular wave, the triangle
Wave blocking filter circuit is converted to sine wave, and the sine wave carries out amplitude increase through amplifying circuit.
4. a kind of integral type photoelectricity absolute value encoder according to claim 1, which is characterized in that the sinusoidal conditioning mould
Block eliminates the High-frequency Interference in sinusoidal signal by capacitor.
5. a kind of integral type photoelectricity absolute value encoder according to claim 1, which is characterized in that the cosine improves mould
The common mode interference that block inhibits the cosine signal of Differential Input to generate by common mode inductance.
6. a kind of integral type photoelectricity absolute value encoder according to claim 1, which is characterized in that the rotary transformer
Output type be Sin/Cos, and it is equipped with the digital filtering for eliminating hysteresis effect DSP between decoding arithmetic element
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821692704.XU CN208847206U (en) | 2018-10-18 | 2018-10-18 | Integral type photoelectricity absolute value encoder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821692704.XU CN208847206U (en) | 2018-10-18 | 2018-10-18 | Integral type photoelectricity absolute value encoder |
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| CN208847206U true CN208847206U (en) | 2019-05-10 |
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| CN201821692704.XU Active CN208847206U (en) | 2018-10-18 | 2018-10-18 | Integral type photoelectricity absolute value encoder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113220043A (en) * | 2021-05-11 | 2021-08-06 | 杭州海康威视数字技术股份有限公司 | Alignment adjustment method of blocking component, controller and gate equipment |
| CN114777818A (en) * | 2022-03-09 | 2022-07-22 | 西门子数控（南京）有限公司 | Signal excitation unit of encoder and encoder |
-
2018
- 2018-10-18 CN CN201821692704.XU patent/CN208847206U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113220043A (en) * | 2021-05-11 | 2021-08-06 | 杭州海康威视数字技术股份有限公司 | Alignment adjustment method of blocking component, controller and gate equipment |
| CN114777818A (en) * | 2022-03-09 | 2022-07-22 | 西门子数控（南京）有限公司 | Signal excitation unit of encoder and encoder |
| CN114777818B (en) * | 2022-03-09 | 2024-03-15 | 西门子数控（南京）有限公司 | Signal excitation unit of encoder and encoder |
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